Category Archives: Wood

Separation of Wood Truss Plates in a Fire

Posted by in Fire Damage, Wood | September 18, 2017

When examining wood trusses for fire damage there is more to consider than charred members, excessive drying of the lumber, and the release of sap. Here’s a reminder to check the steel plates for separation or loosening.   Disclaimer Read More

The Importance of Crawlspace Ventilation

Posted by in Foundations, Mold Growth, Wood | March 27, 2017

The decay (and the foot step through the floor in the featured photo) seen here is characteristic of damage from prolonged exposure to excessive moisture. The severity of the decay indicates that the problem has been progressing over a period… Read More

Case Study: A Sagging Roof

Posted by in Case Studies, Roof, Wood | August 29, 2016

The roof of this barn exhibits a sag (featured photo).  The roof is framed with rafters (Figure 1).  The rafter ties are set very high to allow clearance for interior activities; however, this prevents the ties from adequately restraining the… Read More

The Case of the Sinking Wood Deck

Posted by in Foundations, Wood | March 14, 2016

It was cold and rainy afternoon.  And, while gazing at the rain sheeting down the window, I was ruminating on my plans for the coming weekend.  My quite ruminations were interrupted by the loud, sudden ringing of my desk phone.  It was a call… Read More

What Can We Tell from This Photo? (Case Study 13)

Posted by in Case Studies, Mold Growth, Roof, Winter Concerns, Wood | February 22, 2016

The feature photograph was taken in an attic during a warmer month of the year.  It documents the condition on the underside of the roof deck.  This photograph provides valuable information regarding the scope and history of airborne moisture in the attic. From… Read More

An Oversight Makes a Rafter More Susceptible to Fracture

Posted by in Construction & Shortcuts, Roof, Structural Analysis, Wood | December 07, 2015

In the featured photograph we see where the rafter fractured at its end.  This fracture was due to vertical tension in the rafter.  That is, the weight of the roof framing and the snow were pushing downward along the length… Read More

What is causing the cracking in my ceiling?

Posted by in Wood | October 12, 2015

We have looked at numerous single-family ranch style dwellings constructed in the 1960s where the ceiling exhibits cracking between the dining room and the living room.  It’s a crack that emanates from the corner of two walls.  Those of you… Read More

What Can Happen to Unbraced Wood Truss Web Members?

Posted by in Construction & Shortcuts, Structural terms, Wood | September 21, 2015

So, what happens when the web members of a wood truss are not braced laterally as specified by the truss manufacturer? When a wood truss is designed and constructed by a truss manufacturer, the manufacturer commonly provides drawings that show… Read More